mark, good morning. >> good morning, erica. well, not just the legal process toward extradition is under way in a belgrade court today, a series of medical tests have also been performed on ratko mladic, and his family is calling for more. the butcher of the balkans is now, according to his lawyers, a frail, old man. too frail, they suggest, to endure the rigors of a trail. he's 69 now, and after three reported strokes, his ability to comprehend proceedings is under question. outside the belgrade courthouse today, the family spoke. >> we are focused at this time on his health, his condition. >> reporter: weakness is not a term that would have been used to describe ratko mladic in his prime. ruthless, maybe. also, murderous, brutal, pitiless, even sadistic. he is accused of ordering the shelling of sarajevo, and of targeting areas where civilian casualties were likely to be highest. like the water taps that were set up because the main water supply was cut.